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Tire +/- size guide for FR-S/BRZ
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This PDF contains most of info needed to make a decision on how big or small you want to go on your tires. I tried to include every size that had tires available from 225/50/16 to 255/35/18.
Remember your tires are basically the largest gear your car has; making them bigger or smaller can have a significant effect on the feel of your car due to weight and gearing. If someone wants to post screen shots so people don’t have to open the PDF please feel free. I ran out of time got to get back to work. |
245s/255s? Get real. A Toyota engineer was quoted in a review saying that you can't go wider than 215s on the front. Sure you can toss fatties on the rear if you want an understeering car. Kind of defeats the whole raison d'etre for the Toyobaru though - low-limit tossability. And trying to compensate for the understeer through suspension adjustments (harder rear shocks/sway/springs) will cause the ride to suffer.
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Tell that to volk who put 245/40 on the front and kept it in the fender.
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235F 8.5 and 255R 9.5 18's
perfect combo!!! Keep my stock ones for snow tires. |
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Then call up volk and ask them why after they measured their car with Aftermarket coilovers that they decided to make an impossibly large wheel in a 40-44 offset and slap them up for sale specifically for the toyobaru. I guess volk stopped being performance oriented.
My reasoning is car companies will always be conservative. Why would they build a car with maxxed out tire width in the front and claim it was built for the Aftermarket. It makes zero sense to me. Now I can believe 215 is the largest you would want to run on a 7 wide wheel. |
Because people will buy anything, no matter how ridiculous or what it does to handling or the ride, if they think it looks cool?
I'm just reporting what a Toyota engineer said, he could have been mistaken. |
There is certainly much to gain for performance reasons from increased tire width (front and rear). There are compromises for everything and for some the stock size will work well or just a different tire compound. Others that are looking for large increases in grip for competition will want a different compound and probably a wider tire as well and you can definitely go a little wider in front without issue.
- Andrew |
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http://www.ft86club.com/forums/showp...4&postcount=48 Quote:
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i really see nothing wrong with 245's all around. its actually what im planning. 245/40-17. the only problem i see with your list is they are all of larger diameter than stock. id really prefer going down to help with acceleration a bit. 245/40-17 is basically the same as stock. 235/40-17 is a tad smaller.
ive even considered going 225/45-15 on a 15x9 all around. basically.. theres tradeoffs everywhere. .and just because one person said this or one company said that. .. doesnt mean that answer is definite for everyone. it all depends on what you want to do. .and its important to learn as much as you can about these things so that you can make an informed decision about what you want/need as far as your uses of it are concerned. |
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And you are limited to one real tire choice for 225/45/15 also :) Personally I'm trying 235/40/17 after I kill the stock tires a little, or I'll leave them alone for longer and just do a major refresh of my other car instead. |
well theyre basically stock wrx sized rotors. they should clear 15's no problem. also depends on the 15. a 15" te37 has HUGE brake clearance on the inside for example.
but yea, only really one tire size. thats why im kicking the idea around. the 235/40-245/40 is really looking like a nice bet. 17x9 all around with a 235/40 should be a killer setup on this car |
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17x9s are hard to find in decent light and < $350/wheel options in 5x100 from what I remember when I spent 30 minutes or so looking before. Have you found any that fit that aren't 500-800 per wheel that aren't > 18lbs each? Let me know which ones if you have so I can consider them :) I was thinking I'd have to go with 17x8s (8.5 is the spec wheel width for star specs in 235/40 and 245/40 IIRC), so was leaning towards the RPF1 or PF01 in 17x8 +35. |
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My buddy emailed them about doing it, and I think he was quoted <$300 per wheel! |
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The 4 pot WRX caliper may have better clearance than the BRZ sliding caliper but I do not know. - drew |
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Ive been waiting for a guide like this. Is this a legitimate source? the amount of hooplaw has me worried.
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I already pre ordered rs-3's in 255/17 (40 or 45 section width, cant recall atm)
so...turns out that's gonna fit...im sure...., I'mma wait til I get the car to order my rims everyone is going to hate on my car so hard I can't wait to piss everyone off with my rim choice...hint it's functional, |
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http://i90.photobucket.com/albums/k2...tjapan-287.jpg http://i90.photobucket.com/albums/k2...tjapan-285.jpg |
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I read the quote more about ruining steering feel as opposed to physically fitting. Same problem the new Mustang engineers had - they wanted even skinnier tires on the front but figured the general public would think it was a joke. I suspect the 215s are part of the "near 911" steering feel we read in reviews. |
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p.s. i can't wait to throw a roof rack on mine. j/k:barf: |
@Getagrip, I was looking for the statement that only 215s would fit up front.
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215/50-16 be odd rather than 205/55-16 ?
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I think sticking to 17s would be best for this car. The car doesn't command a ton of HP/TQ so if you're looking for performance only, going wider and lower profile is the way to go. 245/40/17 on 17x9 is what I'm looking to do. :thumbup: You won't really lose too much steering feel while gaining more traction. In fact, just going 17x7.5 with a 215/45/17 with a Hankook RS3 or any other sticky tire will be sufficient for stock suspension! Oh well, testing at the track will reveal what is best. Stay tuned for that in the future! :)
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Useful thread on tires should not require people to download some pdf. And should have a lot more info. Here's a good example, that's also relevant since base LGT has the same tire size (different stock offset on wheels though)
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The main point was to help educate people so they don’t put way to big a tire on and then wander why their car was so slow. |
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1 Attachment(s)
Useful tool for compairing tire size from 1010tires.com. It gives you % difference in diameter among other things. Attached a screenie of potential winter tires for 16" wheels.
http://www.1010tires.com/TireSizeCalculator.asp Oh and hello from a noob ^^ Edit: whoops just realized OP's source for the pdf is the same site/shop... and forgot the link :p |
Hi Noob! Cute cat!
I'm going to put Bugatti Veyron size tires on there. Should give me at least 50 more horsepower. But seriously, as I recently said in another post, I wish it came with 225/45/17 tires and 17x7.5 wheels. They'd give you enough space for Brembo calipers and a little more tire for stability and a little more sidewall for comfort and grip. However, I am against increasing the stock diameters unless it were a matter of 1-4 mm. So I'll keep it stock size and keep the stock calipers but replace the tires with Michelin Pilot Super Sports and possibly replace the wheels with the BBS RF in the same size/offset. |
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